In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow() This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node" and then dereferences it on the next line. Two lines later, we take a mutex so I don't think this is an RCU safe region. Re-order it to do the dereferences before queuing up the free.
Conclusion & alert: CVE-2025-39978 is rated Low Risk (15.8/100): low exploitation likelihood (EPSS 0.05%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-01 | 0.03% | 0.05% | +0.02% |
| 2 | 2026-03-13 | 0.05% | 0.03% | -0.02% |
| 3 | 2026-02-14 | — | 0.05% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
No CVSS data in dataset for this CVE.
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2025-39978 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. | https://security-tracker.debian.org/tracker/CVE-2025-39978 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-39978 |
suse
|
high | CVE-2025-39978 severity important: SUSE including 525 source package names (13.2-6.19:libjitterentropy3-3.4.1-3.1, 13.2-6.19:libopenssl3-3.1.4-6.1, …), 1373 product×package rows across 307 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (307 product lines)): Fixed 1020, Known Affected 231, Known Not Affected 101, First Fixed 21. | https://www.suse.com/security/cve/CVE-2025-39978/ |
ubuntu
|
medium | CVE-2025-39978 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1405 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1010, ignored 177, released 122, not-affected 54, needed 38, needs-triage 2, pending 2. | https://ubuntu.com/security/CVE-2025-39978 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||